1005392649 has 4 divisors (see below), whose sum is σ = 1340523536. Its totient is φ = 670261764.

The previous prime is 1005392623. The next prime is 1005392723. The reversal of 1005392649 is 9462935001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1005392649 - 2⁹ = 1005392137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1005392249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167565439 + ... + 167565444.

It is an arithmetic number, because the mean of its divisors is an integer number (335130884).

Almost surely, 2^1005392649 is an apocalyptic number.

It is an amenable number.

1005392649 is a deficient number, since it is larger than the sum of its proper divisors (335130887).

1005392649 is an equidigital number, since it uses as much as digits as its factorization.

1005392649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335130886.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 1005392649 is about 31707.9272264839. The cubic root of 1005392649 is about 1001.7943281276.

The spelling of 1005392649 in words is "one billion, five million, three hundred ninety-two thousand, six hundred forty-nine".